Sash-holder.



' A. H. MIX. SASH HOLDER. APPLIOATION FILED NOV. 9, 1908.

Patented Feb.'2, 1909.

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A. H. MIX.

SASH 110mm. APPLIOATION FILED NOV. 9, 1908.

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Application filed November 9, 1905. Serial. No. $61,731.

To all whom it may concern:

Be it known that I, ALLEN HOWAR Mix,

of Burlington, in the county ofChittendenand State of Vermont, have invented a new and useful Improvement Sash-Holders, of which the following is a specification;

My invention relates to that kind of window screen which isadapted to slide up and down between guides onthe window frame,

and is provided for this purpose on its vertical edges with outwardly spring pressed rollers which adapt themselves to slight 1nequalities and varlations. 1n -w1dth of the window frameto which they are fitted and at the same time, by reducing friction, facilitate the raising'and lowering of the screen.

My improvement has to do with means for holding the screen in elevated position in the position to. which it may be raised without, however, locking it in that position or holding it there so tightly that it may not be lowered by simply pressing or pulling down on the screen frame, and it consists in a simple and effective device for this'purpose, the novel features and characteristics of which will first be described in connection with the accompanying drawings and will then be more particularly pointed out in the claim.

In the drawings-Figure 1 is a front elevation of a screen and associated parts of the window frame and guides embodying my invention, the screen being in lowered position and the lower spring pressed roller device at the left of the screen being shown in vertical section: Fig. 2 is a like section on enlarged scale of said roller device in the position it occupies when the screen is elevated far enough to bring the same into en-. gagement with the holding or retaining recess in the guide. Fig. 3 is a cross'section on line 33, Fig. 1. Fig. 1 is across section on line M, Fig. 2. Fig. 5 is a perspective View of a portion of one of the vertical side bars of the screen frame together with that portion of its associated guide rail in which the retaining recess is formed.

In the drawings A1(Fig. 1) is a screen of any approved construction which is adapted to move between guides B, on the opposite vertical faces of the window frame to which the screen is applied, and is provided with i any approved spring pressed roller devices to move in the guides. There" will be usually two of such outwardly spring pressed roller devices contained in recesses inthe outer edge or each vertical bar of the screen rra1a ','ane the rollers will project so as to bear against the guides, and preferably to enteryertical guide grooves formed in the same. Suitable retracting devices, typified at It (Fig. 5) may be'at-tached to the free end of the roller brackets or carriers, so as'to manually retract the rollers within their recesses whenever it is desired to fit the screen to, or 'withdraw it from, the guides.

l'aving reference now more particularly to Figs. 1 ,4, eachspring pr'essed'roller. device in jthe' present instance consists of a sheet metal bracket or carrier 0 in which is mounted a roller cl. The bracket or carrier is located in a recess a in the frame, where it is secured by a screw or other suitable fastener passing through its lower flexible end of, into the frame. Thistlexible end permits thebracket to move in and out as it would if there were a hinge. Any suitable form of hinge indeed can be used for this purpose. The upper free end 0 of the bracket is spring-pressed outwardly by a spirally coiled spring f which is confined between and the bottom of the recess 6. A retract-or R which limits the extent to which the roller can be pressed outwardly, and which can be used also to manually retract the roller as desired, is connected to the roller bracket by. its stem 0 which extends through an opening in the frame and through the coiled spring f to the free end 0 of the bracket to which it is suitably secured. The guide B is of L shape in cross section,v and has in its face adjoining the roller bearing face of the screen frame a longitudinal groove Z) which the rollers on that side of the'screen enter bearing normally against the bottom of the same.

Thus far there is nothing essentially new in the construction. I come now to those features which embody my improvement, which consists in the provision of a holding member on the roller bracket or carrier, in conjunction with a retaining recess located at a suitable point in the guide, to permit the roller, when the screen has been raised to the desiredheight, to move forward, or outward, into the recess far enough to allow the holding member on the roller carrier or bracket to enter the retaining recess and engage the retaining surfaces therein these surfaces, as well as those of the holding member which engage 1t, being so inclined as to hold only by frictlon, which is not suflicient to prevent the screen framefrom being lowered by the application of sufficient downward pull or pressure thereon.

The holding member on the roller bracket consists in this instance of two rounded projections g on the face of the bracket, one on each side of the roller. The retaining recess in the guide consists of two shallow concave portions 71, and a deeper central concave portion l1, between the two shallower portions, to receive the roller. The parts are so proportioned that when the roller moves in its groove in the unrecessed portion of the face of the guide, it will bear against the bottom of the groove while the projections g are held out of contact with the face of the guide, as illustrated in Figs. 1 and 3. But when the recess is reached, the central portion h of it which will be entered by the roller is of such depth that the holding projections g are permitted to enter and fit into and against the shallower portions it of said recesses, thus establishing a frictional contact which will hold the screen in its elevated position. As, however, there are no abrupt corners to the projections g and the several portions of the retaining recess, downward pull or pressure on the screen frame will move it down until the roller once more takes its bearing against the guide, when the projections 9 will be again lifted from frictional contact with the guide.

It will usually be sufficient to provide one retaining recess in each gulde, so that one roller bracket on each side of the frame can be used as a holding member. Of course the roller brackets-all four of themmay be of like construction; for it is only when a proper recess is provided at the proper point in the guide that any holding member on any one of the brackets is ever called into action.

Having described my improvement and the best way known to me of carrying the same into effect I state in conclusion that I do not limit myself to the precise structural details hereinbefore set forth in illustration of my invention, since manifestly the same can be varied in a number of particulars without departure from the spirit. of the invention: but

What I claim as new and desire to secure by Letters Patent is as follows:

In combination with the screen frame, an outwardly spring pressed roller bracket or carrier located in a recess in said frame, and a roller mounted in said carrier, of a holding member on and projecting from the outer face of the carrier, a guide against which the roller normally bears so as to relieve the holding member from frictional contact with said guide, and a retaining recess in the guide having a shallower portion to receive and frictionally engage the holding member, and a deeper portion to receive the roller, substantially as and for the purposes hereinbefore set forth.

In testimony whereof I allix my signature in presence of two witnesses. 7

ALLEN HOWARD MIX.

Witnesses:

J. H. J ACOBS, F. E. ROBINSON. 

